Stutter-Invariant properties are usually used to enable Partial-Order
Reductions during model checking. We first describe seven practical
checks to decide if an LTL or PSL property is stutter-invariant: they
are all based on one or two operators that are simple to implement
(joint work with Thibaud Michaud). Then we show how model checking of
stutter-invariant properties can be done using different variants of
testing-automata: a type of automata that tracks changes to atomic
propositions instead of tracking their values (joint work with Ala
Eddine Ben Salem and Fabrice Kordon). The connection between these
two parts is a normal form (introduced by Etessami) for automata
representing stutter-invariant properties.